Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
The total offset (stem type and head/neck length) stratified into 5 groups. Relative risk (RR) of stem revision for aseptic stem loosening (Cox, adjusted for sex, age, stem size, and femoral head size)
| Total offset | No. of hips | No. of standard stems | No. of lateralized stems | RR (95% CI) |
|---|---|---|---|---|
| ≤ 3 mm | 2,969 | 2,969 | 0 | – |
| 3–5 mm | 4,391 | 4,391 | 0 | 1.6 (1.1–2.5) |
| 5–7 mm | 1,411 | 1,411 | 0 | 1.4 (0.8–2.4) |
| 7–9 mm | 495 | 238 | 257 | 5.1 (3.0–8.9) |
| > 9 mm | 504 | 86 | 418 | 3.9 (2.2–6.9) |
